A new hadrosaurid dentary from the latest Maastrichtian of the Pyrenees (north Spain) and the high diversity of the duck-billed dinosaurs of the Ibero-Armorican Realm at the very end of the Cretaceous

In the latest Maastrichtian, the European hadrosauroid fauna was more diverse than those of North America and Asia. The European record of hadrosaurid dentaries is an example of this diversity, and most of the sites with mandibular remains are located in the Ibero-Armorican Realm. Within the Iberian Peninsula, most of the remains are located in the Tremp Basin (South Central Pyrenees). Two of the three valid hadrosaurid taxa defined in this basin are from the Blasi sites (Arén, Huesca province): Arenysaurus ardevoli (Blasi-3) and Blasisaurus canudoi (Blasi-1). A new locality in Blasi (Blasi 3.4) has provided a new dentary from an indeterminate euhadrosaurid. This dentary presents some characters intermediate between Arenysaurus and Blasisaurus, some characters similar to Pararhabdodon isonensis (from the nearby province of Lleida), and some characters of its own. Nevertheless, due to its fragmentary character, without dentition or its edentulous anterior part, it cannot be determined above the level of Euhadrosauria. It thus represents a fourth Iberian euhadrosaurian taxon in the Ibero-Armorican Realm, different from Arenysaurus, Blasisaurus and Pararhabdodon, increasing the diversity of hadrosauroids in this realm at the very end of the Cretaceous.

[1]  B. Vila,et al.  The diversity of sauropod dinosaurs and their first taxonomic succession from the latest Cretaceous of southwestern Europe: Clues to demise and extinction , 2012 .

[2]  E. Cope.  Synopsis of the Extinct Batrachia, Reptilia and Aves of North America , 2011 .

[3]  B. Vila,et al.  The chronology of dinosaur oospecies in south-western Europe: Refinements from the Maastrichtian succession of the eastern Pyrenees , 2011 .

[4]  P. Cruzado-Caballero,et al.  Blasisaurus canudoi gen. et sp. nov., a new lambeosaurine dinosaur (Hadrosauridae) from the Latest Cretaceous of Arén (Huesca, Spain) , 2010 .

[5]  M. Benton,et al.  Dinosaurs and the island rule: The dwarfed dinosaurs from Haţeg Island , 2010 .

[6]  M. Benton,et al.  Palaeobiogeographic relationships of the Haţeg biota — Between isolation and innovation , 2010 .

[7]  J. I. Ruiz-Omeñaca,et al.  Evidencias de la coexistencia de dinosaurios hadrosaurinos y lambeosaurinos en el Maastrichtiano superior de la Península Ibérica (Arén, Huesca, España) , 2010 .

[8]  A. Prieto-mÁrquez,et al.  Global phylogeny of Hadrosauridae (Dinosauria: Ornithopoda) using parsimony and Bayesian methods , 2010 .

[9]  F. D. Vecchia.  Tethyshadros insularis, A New Hadrosauroid Dinosaur (Ornithischia) from the Upper Cretaceous of Italy , 2009 .

[10]  O. Oms,et al.  The end-Cretaceous dinosaur succession in Europe: The Tremp Basin record (Spain) , 2009 .

[11]  J. Wagner,et al.  Pararhabdodon Isonensis and Tsintaosaurus Spinorhinus: A New Clade of Lambeosaurine Hadrosaurids from Eurasia , 2009 .

[12]  P. Cruzado-Caballero,et al.  Hadrosauroid Dinosaurs from the Latest Cretaceous of the Iberian Peninsula , 2009 .

[13]  O. Oms,et al.  The last hadrosaurid dinosaurs of Europe: A new lambeosaurine from the Uppermost Cretaceous of Aren (Huesca, Spain) , 2009 .

[14]  H. Sues,et al.  A new basal hadrosauroid dinosaur from the Late Cretaceous of Uzbekistan and the early radiation of duck-billed dinosaurs , 2009, Proceedings of the Royal Society B: Biological Sciences.

[15]  B. Vila,et al.  Integrated stratigraphy from the Vallcebre Basin (southeastern Pyrenees, Spain): New insights on the continental Cretaceous−Tertiary transition in southwest Europe , 2007 .

[16]  P. Gignac,et al.  NEONTOLOGICAL EVALUATION OF PELVIC SKELETAL ATTRIBUTES PURPORTED TO REFLECT SEX IN EXTINCT NON-AVIAN ARCHOSAURS , 2007 .

[17]  R. Reisz,et al.  ANATOMY AND RELATIONSHIPS OF LAMBEOSAURUS MAGNICRISTATUS, A CRESTED HADROSAURID DINOSAUR (ORNITHISCHIA) FROM THE DINOSAUR PARK FORMATION, ALBERTA , 2007 .

[18]  G. Rivas,et al.  HADROSAUROID DINOSAURS FROM THE LATE CRETACEOUS OF SPAIN: PARARHABDODON ISONENSIS REVISITED AND KOUTALISAURUS KOHLERORUM, GEN. ET SP. NOV. , 2006 .

[19]  D. Suzuki,et al.  NIPPONOSAURUS SACHALINENSIS (DINOSAURIA; ORNITHOPODA): ANATOMY AND SYSTEMATIC POSITION WITHIN HADROSAURIDAE , 2004 .

[20]  J. Loeuff,et al.  Late Maastrichtian continental vertebrates from southwestern France: Correlation with marine fauna , 2002 .

[21]  X. Murelaga,et al.  New dinosaur sites correlated with Upper Maastrichtian pelagic deposits in the Spanish Pyrenees: implications for the dinosaur extinction pattern in Europe , 2001 .

[22]  P. Godefroit,et al.  The Maastrichtian (Late Cretaceous) lambeosaurine dinosaur Charonosaurus jiayinensis from north-eastern China , 2001 .

[23]  P. Godefroit,et al.  Charonosaurus jiayinensis n.g., n.sp.,a lambeosaurine dinosaur from the Late Maastrichtian of northeastern China , 2000 .

[24]  D. Weishampel,et al.  A primitive euhadrosaurian dinosaur from the uppermost Cretaceous of the Ager syncline (southern Pyrenees, Catalonia) , 1999 .

[25]  D. Weishampel,et al.  First lambeosaurine hadrosaurid from Europe: palaeobiogeographical implications , 1999, Geological Magazine.

[26]  C. Sternberg.  A new hadrosaur from the Old-man Formation of Alberta discussion of nomenclature , 1953 .

[27]  Telmatosaurus, New Name for The Dinosaur Limnosaurus , 1903, Geological Magazine.

[28]  O. C. Marsh.  Principal characters of American Jurassic dinosaurs; Part VII, On the Diplodocidae, a new family of the Sauropoda , 1884, American Journal of Science.

[29]  O. C. Marsh.  Principal characters of American Jurassic dinosaurs, Part III , 1880, American Journal of Science.

[30]  H. G. Seeley,et al.  On the Dinosauria , 1879 .

[31]  X. Pereda-Suberbiola.  Biogeographical affinities of Late Cretaceous continental tetrapods of Europe: a review , 2009 .

[32]  A. Prieto-mÁrquez.  Phylogeny and Historical Biogeography of Hadrosaurid Dinosaurs , 2008 .

[33]  P. Godefroit,et al.  New Hadrosaurid Dinosaurs from the Uppermost Cretaceous of Northeastern China , 2008 .

[34]  F. D. Vecchia.  TELMATOSAURUS AND THE OTHER HADROSAURIDS OF THE CRETACEOUS EUROPEAN ARCHIPELAGO . AN OVERVIEW. , 2006 .

[35]  J. I. Canudo,et al.  Nuevas evidencias de la presencia de hadrosaurios lambeosaurinos (Dinosauria) en el Maastrichtiense superior de la Península Ibérica (Arén, Huesca) , 2005 .

[36]  P. Godefroit,et al.  The lambeosaurine dinosaur Amurosaurus riabinini, from the Maastrichtian of Far Eastern Russia , 2004 .

[37]  Y. Laurent.  Les faunes de vertébrés continentaux du Maastrichtien supérieur d'Europe : systématique et biodiversité , 2002 .

[38]  R. Linares,et al.  El "Garumniense" prepirenaico , 2001 .

[39]  D. Grigorescu,et al.  Telmatosaurus transsylvanicus from the late Cretaceous of Romania: the most basal hadrosaurid dinosaur , 1993 .

[40]  J. S. Llopis,et al.  Pararhabdodon isonense, n. gen. n. sp. (Dinosauria): estudio morfológico, radio-tomográfico y consideraciones biomecánicas , 1993 .

[41]  H. Seeley.  I. On the classification of the fossil animals commonly named Dinosauria , 1888, Proceedings of the Royal Society of London.